I wish to build a circuit for controlling a 7 segment display. However, in place
of the "segment", I will have a row/column of either 4 or 5 LED's. The LED's will be mounted as a 4-5 inch display to represent a single digit. I need to be able to advance the digit in numerical order using a contact switch. ie. tap the switch 4 times to display a "4". Two more taps to display a "6"
etc.
Elementary for this awesome group, I know. I promise not to ask you guys to conduct a basics class for me- but a nudge in the right direction would be great!
If it helps or matters-
I am considering a source voltage of 9 volts and I think that my LED's will drop about 1.7 volts ea. at a forward current of around 20mA. Perhaps an array of 4 such LED's, comprising a "segment" would require a 120 ohm 1/4 W resistor and the entire 16 LED display, if all on at the same time would draw at the most, 80mA
Is there an IC suitable for this little operation? thanks!
of the "segment", I will have a row/column of either 4 or 5 LED's. The LED's will be mounted as a 4-5 inch display to represent a single digit. I need to be able to advance the digit in numerical order using a contact switch. ie. tap the switch 4 times to display a "4". Two more taps to display a "6"
etc.
Elementary for this awesome group, I know. I promise not to ask you guys to conduct a basics class for me- but a nudge in the right direction would be great!
If it helps or matters-
I am considering a source voltage of 9 volts and I think that my LED's will drop about 1.7 volts ea. at a forward current of around 20mA. Perhaps an array of 4 such LED's, comprising a "segment" would require a 120 ohm 1/4 W resistor and the entire 16 LED display, if all on at the same time would draw at the most, 80mA
Is there an IC suitable for this little operation? thanks!